SCA: security update for mesop (GHSA-8qvf-mr4w-9x2c)

critical Tenable Self-Hosted Container Security Plugin ID 438977

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- Mesop is a Python-based UI framework that allows users to build web applications. Versions 1.2.2 and below
contain a Path Traversal vulnerability that allows any user supplying an untrusted state_token through the
UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend.
This can result in application denial of service (via crash loops when reading non-msgpack target files as
configurations), or arbitrary file manipulation. This vulnerability heavily exposes systems hosted
utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads
overwriting or explicitly removing underlying service resources natively outside the application bounds.
This issue has been fixed in version 1.2.3. (CVE-2026-33054)

Solution

Update the mesop library and its related packages to version 1.2.3 or later.

Plugin Details

Severity: Critical

ID: 438977

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 3/19/2026

Updated: 6/1/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.95

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-33054

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/18/2026

Vulnerability Publication Date: 3/18/2026

Reference Information

CVE: CVE-2026-33054

cwe: CWE-22

Detections

Analytics